
| 牌號 | 抗拉強(qiáng)度ób/MPa | 屈服點(diǎn)ós/MPa | 斷后伸長率δ5(%) | 壓扁試驗(yàn) 平板間距 H/mm | ||
| 鋼管壁厚 | ||||||
| ≤16m | >16-30mm | >30mm | ||||
| ≥ | ||||||
| 10 | 335 | 205 | 195 | 185 | 24 | 2/3D | 
| 20 | 390 | 245 | 235 | 225 | 20 | 2/3D | 
| 35 | 510 | 305 | 295 | 285 | 17 |  | 
| 45 | 590 | 335 | 325 | 315 | 14 |  | 
| Q345 | 490 | 325 | 315 | 305 | 21 | 7/8D |